LOHOME Computer Wrist Rest Armrest, Home & Office Computer Arm Support Mouse Pad Arm-stand Desk Extender Adjustable for Chair or Desk This Arm Support is ergonomically designed to support elbow and forearm while using a computer keyboard and mouse. Outstanding design makes you move freely, comfortably and effortlessly to perform your computer tasks. 180 degrees Rotatable, made of strong ABS plastic, ergonomic design for desk and chair, very easy to install. Reduce Stress from cervical vertebrae, shoulder, arm and wrist; keep correct posture, avoid cervical vertebrae ache, mouse hand and nearsightedness. Metal holdfast makes it much stronger than plastic while attaching to computer desk up to 5cm thick, special rubber pad ensures tight table grip. Magic straps make it easy to fasten to most sizes of chair armrest.